Thanks for doing this presentation and for sharing it. I love such videos , straight to the point with the pictures and explanations. Very easy to understand and learn ! Cheers
Oops....forgot to add that cylinder 5 was probably registering misfire codes due to the vibration of the camshaft due to the back-and-forth high speed movement inside of the cam gear. That's just my reasoning for it.
I like that theory. Someone else mentioned that there may be a clue in the fact that cylinder 1 had the most misfires. Cylinder 3 had about 33% less than cylinder 1 and cylinder 5 had about 33% less than cylinder 3.
In my endless pursuit of knowledge, I find myself enjoying your videos time and again. Thank you for explaining things. And also thank you for not begging for likes and ridiculous over editing, etc. -Matt from Florida
Great job tracking down the problem PJ. The last Toyota I had that sheared a pin in the cam was because the engine was starving for oil at the cam. I saw your comment that they decided to go with a reman engine because of more internal damage.
Yeah, during tear down Tim found more damage to the cam journals. Advised the customer that there was a good chance that the damage was caused by the engine having low oil pressure.
Thinking that the exhaust valve timing is causing the misfire..... then the more exhaust “EGR” effect would cause more misfires. Since the misfires increased from cylinders 1 to 5 it could be due to the difference in back pressure in as it passes through the manifold. Possibly the scavenging affect reducing the “EGR” as the exhaust passes cylinder 3 & 5. Great job. Great presentation. Keep it up.
Poor Tim did a lot of work but good for him to hang in there and actually have an interest. Great job on your end too PJ. I'm sure he appreciates the help and I appreciate the information.
Great diagnosis Pat ! It really threw you a curve ball when checking checking the cam timing checked out perfectly according to the timing marks.The sprockets were in time but the exhaust cam wasn't. Again,excellent job!
Very , very informative video. Thanks a lot, be safe you and your family. You know man you got a very subtile way of explaining hard thing not given to anyone. It's is name is gift. Thanks again (from Algeria).
One of the best diagnostic videos, EVER! Well presented. I do not know why #5 misfired less, or why there was progressively less misfires from #1 to #5. Thank you for sharing.
Absolutely fantastic job PJ. I’m really liking the green screen on this video in your explanations. Love to see some more videos like this in the future. Also love how you’re paying it forward with your old Pulse sensor to Tim. Again great work brother
I had to make so many test videos to get that green screen to work well for me haha. But yeah. Sending Tim that sensor might give him the nudge to start using these tests more often. Or at least I hope that it does!
Awesome video PJ. The power of the scope is undeniable in this video. The issue may not have been found without a complete strip-down of the upper end. Ultimately understanding and being able to read the capture is paramount as proven by the engineer stating that the waveform looked good to him. My take on why fewer misfires appear to occur on no 5 is either the computer not identifying the misfires correctly or that the loose pin is causing the cam to alter its timing slightly through the rotational cycle with cyl 5 being the least affected by timing issues. Once this COVID business is finished I'm sure we'll all see more quality content from you.
I like that theory about the cam shifting. It seems very plausible to me. It would have been cool to see if he had an in cylinder waveform from all 3 cylinders on that bank to compare them.
Good job PJ. I hate to say it, but TAS is nothing more than a procedural hurdle in fixing cars. We need to group together and form a localized TAS with us MDT's and Lexus D.S. By pass TAS and actually fix these cars.
I agree with Gera. Just like how there are some good doctors. And some doctors who kill people. Or some techs who can fix a car, and how others seem to break them. There are really good tas agents. And some that arent so good lol.
Awesome explanation PJ, case studies like these are really inspiring to me to want to learn more about in cylinder waveform analysis. I always find myself thinking about how these techniques would have helped with previous diagnostic jobs I've been involved with. Keep up the awesome work 👍🏻
Ok, I'm done. Excellent, excellent case study. Awesome display of confidence while explaining and clarifying what you saw in the waveforms. Phenomenal find, in the end! That's such a huge gesture, to give Tim a sensor, but certainly not surprised. You're such a kind soul. Cody is freaking awesome. Another genuine & truly amazing guy! I'm glad to know the both of you. Big hugs Pj! 🤗🤗 hopefully see everyone soon!
Normally I don't take in RUclips diagnostic video's. But they way you had presented the material caught my attention kept me intrigued. Yes, there were a few opps in there. But we are all human and tend to make mistakes. Nicely done PJ and kuddo's for helping your friend!!
Thanks Bob! I know you're not a fan of youtube lol. I do need to ask what mistakes were made so that I don't make them again. I believe that Jim Cokonis caught one and he is making me figure out the mistake the hard way right now lol
@@VoltageDropDiagnostics One you already caught and made a correction to in your presentation. The other may be an accent as I thought you kept referring to the phase rulers as rollers. It may have been my old ears playing tricks on me. I am wondering if Toyota publishes valve opening specs in degrees as if you could have referenced the crank sensor and measured the degrees the exhaust valve opened either to late or early. A lot of times if I am suspecting an issue. I will use two WPS's. One in the affected cylinder and the other in the companion cylinder because they are 360* apart and you can compare the valve opening events a lot easier on one capture. Just a thought. Very nicely done sir!!!!
Yeah. I have a Pittsburgh accent. We talk funny lol Toyota does offer valve timing specs. If you use TIS. It will be under the new car features tab. It is kind of hidden. Unfortunately I don’t use it too often anymore because of VVT and they now just give you a valve timing window. I wish they’d say that “at idle the EVO is x degrees.
@@VoltageDropDiagnostics We all have our accents...lol I did not know Toyota has the specs posted in the NCF. I appreciate the tidbit. I am going to search this out. Most manufactures have now given us the ability to see more data such as the VVT as in desired and actual. Engineers have a hard time giving us proper information because they feel we don't need to know it. This has been going on for decades. The average technician is a lot more educated than 40 years ago. But this makes us better technicians.
I agree. But i struggle with Toyota VVT timing data pids. From 02-15ish every time i look at the VVT data it reads 0 degrees. I can get the data pids to read “something” if i go into active test. But even when I do that. They don’t make sense to me lol
Very nice find 👍. Bravo. BTW: i have one of Cody's gen-3 PDS and really liking it; crisp resolution and no noise (while experimenting with it on my own work van, i discovered a tiny intake problem in it's infancy 😠.
very informative, your (Tims) path of diagnosing makes senses, nice to see that you don't just jump to swaptronics or dartboard guessing. My theory of why #5 shows low misfire count is that the cam and gear are surging with in each other caused by the dynamics with in the engine and chains of the cam tensioner.
I agree! I have read a couple good theories from some of the comments on here. It is actually making me wish that I had in cylinder waveforms for all 3 cylinders on that bank.
PJ, Albert Einstein would bow to your genius if he were still alive. Amazing vision and clarity to be able to assemble that puzzle and find the issue! If you have a couple of hours to spare tomorrow, can you please find the cure to this stupid virus so we can all go back to our normal routines? I know you can do it....I have faith in you and your brilliance!
Awesome video man! I love the green screen with images and videos. You’ve always been amazing at explaining what we are looking at and that just made it even better! Thanks for making this study! In my opinion it’s a must watch!
I appreciate that! I had a lot of fun with the green screen as well. I am debating on double a couple more older case studies that I have in this style as well.
Great video again. Great find. I can’t believe how many parts were thrown at it. I’ve had a few teammates with cars that I was going to pick your brain on but didn’t want to bug ya. Keep up the good work!
Hey man. Don't ever feel bad about contacting me. I can't always help. But I try to make time for people who put forth effort before contacting me. I enjoy helping out when I can.
It would nice if you had a exhaust signal but didn't have sensor. Maybe less miss fires on cylinder 5 because of scaveraging exhaust from cylinders 1 and 3. There more exhaust flow past cylinder 5 because 1 and 3 are ahead of it. I don't know but just a thought why you would have less miss fires on 5. Let me know what you think. Stay safe.
I like that theory. A couple other people commented something similar as well. I also wish that he had an exhaust waveform. I wanted to see the overlap and see how much it changed bank to bank.
PJ, as far as the misfire counter goes, I never really trust them when there is more than one cylinder misfiring. I would imagine that there is also the possibility that the cam is advancing and retarding as it rotates. The valve springs are probably placing enough load on the cam to cause it to move in both directions on that gear. This would probably also cause cylinders three and five to not always misfire... We need to actually meet in person some day. I'd enjoy sitting down and sharing diagnostic war stories with you haha.
Hi PJ, First time I've come across your channel. Really impressed with the content and production. I'm also trying to learn more about ociliscope diagnosis and have recently made a cheapo pressure transducer to get me started with in cylinder wave forms. Learned alot from this video, thank you.
great find!!! i'm thinking (just guessing actually) # 5 is probably an artifact of the position and/or placement of the o2/afr sensor on that bank and or vacuum hose placement on the intake. when i fiest started watching i was thinking leaky purge valve sucking fumes out of the tank into one side of the intake
I am gonna answer with "maybe" I think that its plausible. But keep in mind that the engine was breathing. It was just pulling from the exhaust. But I can imagine that having a small effect on the MAF reading that might throw off the VE test a little. But I like that question. I am going to go look at some of the scan tool files that he sent to see if I can see any of the MAF readings.
@@VoltageDropDiagnostics cool it would be interesting to know.......if it did indicate an issue it would perhaps be a good habit to do one at the same time or shortly after confirming customer complaint alongside a relative compression test / intake / exhaust pulse test as all are quite fast and easy and could save a lot of rabbit hole diving......i think sometimes we read fault codes and then jump a few steps instead of establishing the overall mechanical condition of the engine using easy and non intrusive / non committal tests that if nothing else will give an indication that the engine is at least worth spending time and money on
Super vid!! I was gonna watch a Sherlock Holmes mystery tonight but now I don't have to. Reminds me of a Scanner Danner video. That was a loose pulley that allowed the timing to b off. If the intake cam was off, it would have flagged a code because that is monitored. Super cool find!! Thank u!!
Im using a toughbook that has an upgraded hard drive that a friend on mine builds for the automotive community. It also has all of the OEM software downloaded on it as well.
awesome case study PJ thanks for sharing what you and Tim went through, love having this out there. My guess is 5 didn't show on mode 6 because it prob didn't hit a high enough count for the PCM strategy to log it and most likely kept resetting. Nice Job! ...Jay
I wouldn't go that far. I just might be better at examining these waveforms. But some of those TAS agents and engineers are really good. But like everything. There are good and bad.
I think it was more than 5. 3 had only 75% of 1’s mises. 5 had 33% of 3’s. So was the progressive variation the result of exhaust path, as has been wondered. Or was the cam “walking” to and fro in the gear as it rotated? When comparing a good to bad , the overlays can be overlayed on each other so that both can be viewed at the same time by adjusting the opacity.
Yeah, I overlay the waveforms sometimes. But a lot of times it feels more time consuming for me. But maybe it just feels that way fussing about getting everything perfectly lined up. I think you might be onto something about how the misfires get gradually better from 1 to 3 and then 3 to 5
Awesome Awesome Awesome!!!!!! nah brother you did an amazing job explaining that!!!! i really enjoy your videos, a lot of very beneficial information in just about all your videos!!!!!
Regarding the difference in misfires count skewed towards the front of bank 1, any chance that camshaft was actually twisted along its length? I've come across that before. I suppose if you had the luxury and time of checking each in-cylinder waveform and seeing if the exhaust timing offset increased along the bank, that might make a case it was actually twisted and the timing issue was progressively worse at the front of the engine leading to more misfires.
That’s a good question. The reason that it didn’t set timing codes for the exhaust is because this engine does not have an exhaust cam sensor. The ECM only monitors the intake because it has VVT on the intake side.
Theyre not cheap. I always tell people to start with a pulse sensor and see if they like this style of testing. That way theyre not out a substantial amount of money if they don't like these tests.
Alslam Alicom brother great video I have a question does the autel scope able to do In cylinder compression test and if it does how to set up the channel and what's the tool to do this job ., New arab subscriber here brother ,, all the best
A pressure sensor in the intake would have shown a lower vacuum pull for all cylinders on bank one. Maybe it would have also revealed differences between the individual cylinders on bank one as far as #5 lower misfires numbers are concerned.... Otherwise I can imagine that the difference on #5 may have been caused by a not that accurate misfire counter.... Did you/Tim check the cylinder contribution after the repair? If so, were all cylinders equal?
I agree with the pressure sensor in the intake. I also think that an exhaust waveform would have shown am issue where you can see the overlap in an exhaust waveform. Tim hasn't repaired this engine. The more he tore into this engine, the worse it got. It had scored cam journals. And potentially bad main bearings I believe. The customer opted for a reman engine.
I also have a lot of trouble myself determining EV closing and IV opening. I don't have a good method, and I'm not always 100% sure if I get them marked right. Which is why I skipped over those measurements in the video lol. I don't want to give bad info.
@@Diagnosedan Dat heb je mooi goed Danny, hows live? Mooie is dat ik de tip voor deze video kreeg van een student. Ik kende Patrick nog niet. Groetjes Hans
@@VoltageDropDiagnostics Hi Patrick, thanks for being honest, you can't know everything. Otherwise nice content on you're channel. Keep up the goed work. Greetings Hans
Once you start looking at a lot of cars, you learn that valve timing for most of them is always pretty close to the same. But to verify, you could always get a known good waveform. A Facebook page called “automotive waveform exchange” has tons of known good waveforms.
Facsinating, which made me go search to see if this is common (I take care of 3 of those motors in this house) Could not find much, is it just super rare? Or did I not search well? Thanks.
Nope. Not common at all. This is the first time I have seen it. We think that this engine was actually ran out of oil and that the cam temporarily locked up. There is damage to the cam journals on this engine that gives us that inclination.
So after filming this video, and talking to Tim a little more. He found that the cam journals were scored pretty badly, most likely from the engine running low on oil. Why was it low on oil? That I cant answer you. But he ended up talking to the customer and explaining what he found and the customer agreed that the best course of action was to install a reman engine.
Hi there pat. I'm a Toyota expert working at a dealership where parts are thrown at cars. I'm interested in the pressure transducer and pico scope. Is there a training module on the E learning site that I can take to learn about this. Thanks in advance.
Hey Miguel! I have a lot of videos using the picoscope for different diagnosis. But the reality is, Toyota does not give us the best Picoscope training. It is something that I am pushing for though. My advice to you is to find local AFTERMARKET training to attend. Companies like CTI, WTI, ATG, Standard all have scope training, which is where I learned how to use a scope. And also, continue watching youtube videos as well. There is a lot to be learned right here on youtube.
@@VoltageDropDiagnostics thank you pat. I watched your video comparing scopes and clicked on the link for trained by techs. Now to go dig out the dusty pico scope equipment out of the sst box.
Whats up Greg! I see you're still killing it! I don't know how you do so much heavy line work nonstop! Everyday I feel like you're pulling another motor out! haha
Voltage Drop Diagnostics The car gods have answered that prayer! Got a brake job today! On a Bimmer tho 🤣 2012 bmw 750 LI with coils and plugs! Wish me luck lol
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Top notch video editing and explanations of step by step diagnostic approach. Absolutely love it my friend. Keep up good work.💪💪
Thanks! I really enjoyed making this one!
Thanks for doing this presentation and for sharing it. I love such videos , straight to the point with the pictures and explanations. Very easy to understand and learn ! Cheers
I plan on doing another video of this style here soon. I have a couple of cool case studies that I have saved. Stay tuned.
love this video. The quality of this video, content, explanation are textbook quality
Wow, thanks! I am glad that you liked it!
Oops....forgot to add that cylinder 5 was probably registering misfire codes due to the vibration of the camshaft due to the back-and-forth high speed movement inside of the cam gear. That's just my reasoning for it.
I like that theory. Someone else mentioned that there may be a clue in the fact that cylinder 1 had the most misfires. Cylinder 3 had about 33% less than cylinder 1 and cylinder 5 had about 33% less than cylinder 3.
In my endless pursuit of knowledge, I find myself enjoying your videos time and again.
Thank you for explaining things. And also thank you for not begging for likes and ridiculous over editing, etc.
-Matt from Florida
haha! Thanks Matt!
Great job tracking down the problem PJ. The last Toyota I had that sheared a pin in the cam was because the engine was starving for oil at the cam. I saw your comment that they decided to go with a reman engine because of more internal damage.
Yeah, during tear down Tim found more damage to the cam journals. Advised the customer that there was a good chance that the damage was caused by the engine having low oil pressure.
Excellent explanation PJ. Answers are always easy but it’s the pathway to get the answer that isn’t. Super job. Love your content 👍
Well said!
Great video man. Really enjoyed this one!
Thanks Joe! I am glad you liked this one!
Difficult and lovely diagnostics! I have no words to say! Thank you bro! I am training so hard to become as good as you!
haha Thank you! But compared to some of the guys out in the field, I am a nobody. Just here trying to help out where I can.
Hi Patrick, total respect from fellow Toyota technician here in UK.
Wow, thanks!I bet that you work on a lot more toyota diesels over there?
Thinking that the exhaust valve timing is causing the misfire..... then the more exhaust “EGR” effect would cause more misfires. Since the misfires increased from cylinders 1 to 5 it could be due to the difference in back pressure in as it passes through the manifold. Possibly the scavenging affect reducing the “EGR” as the exhaust passes cylinder 3 & 5.
Great job. Great presentation. Keep it up.
I actually really like that theory. I like it a lot actually, and it makes sense to me. Thanks for the input!
Exactly what I thought!
Poor Tim did a lot of work but good for him to hang in there and actually have an interest. Great job on your end too PJ. I'm sure he appreciates the help and I appreciate the information.
Yes, thanks! Yeah, After this one, Tim decided to sign up for Super Saturday!
Thank you Patrick! We all appreciate your hard work!
My pleasure! I'm glad that you enjoy it!
Just awesome case study. Thank you!
Glad you like it!
Great diagnosis Pat ! It really threw you a curve ball when checking checking the cam timing checked out perfectly according to the timing marks.The sprockets were in time but the exhaust cam wasn't. Again,excellent job!
Yeah. This car was a fun car to help diagnose! I am glad that he was comfortable with me making a video on the diag process.
Great technical break down of the timing concern God bless you and your family
Thanks Roy!
You are the best when it comes to valves timing issues. Thanks PJ
haha No. There are far more knowledgeable people out there than myself. Thanks for the kind words.
Very , very informative video. Thanks a lot, be safe you and your family. You know man you got a very subtile way of explaining hard thing not given to anyone. It's is name is gift. Thanks again (from Algeria).
I appreciate that! I really do! I am glad that you enjoyed the video.
Wow Patrick excellent work perfectly thank you God bless you
Thanks man! I’m glad that you liked this one.
One of the best diagnostic videos, EVER! Well presented. I do not know why #5 misfired less, or why there was progressively less misfires from #1 to #5. Thank you for sharing.
Man! Those are kind words! I appreciate it!
Thanks for the lesson! Great case study. And a nice find!
Thanks TDM! I am glad that you liked it!
And i thought toyotas never went wrong...good case study. Shows the importance of getting all the right information to put tgat puzzle together.
haha! Toyota's a pretty legit. Especially this engine. My gut tells me that there is more to the story than what we were told from the customer.
Absolutely fantastic job PJ. I’m really liking the green screen on this video in your explanations. Love to see some more videos like this in the future. Also love how you’re paying it forward with your old Pulse sensor to Tim. Again great work brother
I had to make so many test videos to get that green screen to work well for me haha. But yeah. Sending Tim that sensor might give him the nudge to start using these tests more often. Or at least I hope that it does!
Awesome video PJ. The power of the scope is undeniable in this video. The issue may not have been found without a complete strip-down of the upper end. Ultimately understanding and being able to read the capture is paramount as proven by the engineer stating that the waveform looked good to him. My take on why fewer misfires appear to occur on no 5 is either the computer not identifying the misfires correctly or that the loose pin is causing the cam to alter its timing slightly through the rotational cycle with cyl 5 being the least affected by timing issues. Once this COVID business is finished I'm sure we'll all see more quality content from you.
I like that theory about the cam shifting. It seems very plausible to me. It would have been cool to see if he had an in cylinder waveform from all 3 cylinders on that bank to compare them.
Big thanks to you. I am getting the book right now. Take care.
Hope you enjoy it!
i found your channel through SMA and i gotta say i love your videos! i learn somthing new everytime!
Very informative video. I learned something new about mystery misfires again. Thanks for sharing!
Glad it was helpful!
PJ your video production is on a whole new level, well done very comprehensive.
Thanks Mark!
Good job PJ.
I hate to say it, but TAS is nothing more than a procedural hurdle in fixing cars.
We need to group together and form a localized TAS with us MDT's and Lexus D.S. By pass TAS and actually fix these cars.
They are just like techs. Some are really good, some are really bad. There a few really really good ones. I agree. I’d be down to help out other MDTs
I agree with Gera. Just like how there are some good doctors. And some doctors who kill people. Or some techs who can fix a car, and how others seem to break them. There are really good tas agents. And some that arent so good lol.
Thank you Patrick. Great job. Have a blessed and safe week to you and your family.
Thanks, you too!
Awesome explanation PJ, case studies like these are really inspiring to me to want to learn more about in cylinder waveform analysis.
I always find myself thinking about how these techniques would have helped with previous diagnostic jobs I've been involved with.
Keep up the awesome work 👍🏻
Thanks for watching! And I'm really glad to hear that it is inspiring.
I'm only in the beginning but I love the comfort level, the humour! Badass Pj!! 😊✊👏
Ok, I'm done. Excellent, excellent case study. Awesome display of confidence while explaining and clarifying what you saw in the waveforms. Phenomenal find, in the end!
That's such a huge gesture, to give Tim a sensor, but certainly not surprised. You're such a kind soul. Cody is freaking awesome. Another genuine & truly amazing guy! I'm glad to know the both of you. Big hugs Pj! 🤗🤗 hopefully see everyone soon!
Yes Cuba! At the very latest, Super saturday! I am so excited for the event this year now that it is multiple days!
Great presentation. Thanks for sharing. 👍
Thanks for watching!
Normally I don't take in RUclips diagnostic video's. But they way you had presented the material caught my attention kept me intrigued. Yes, there were a few opps in there. But we are all human and tend to make mistakes. Nicely done PJ and kuddo's for helping your friend!!
Thanks Bob! I know you're not a fan of youtube lol.
I do need to ask what mistakes were made so that I don't make them again. I believe that Jim Cokonis caught one and he is making me figure out the mistake the hard way right now lol
@@VoltageDropDiagnostics One you already caught and made a correction to in your presentation. The other may be an accent as I thought you kept referring to the phase rulers as rollers. It may have been my old ears playing tricks on me. I am wondering if Toyota publishes valve opening specs in degrees as if you could have referenced the crank sensor and measured the degrees the exhaust valve opened either to late or early. A lot of times if I am suspecting an issue. I will use two WPS's. One in the affected cylinder and the other in the companion cylinder because they are 360* apart and you can compare the valve opening events a lot easier on one capture. Just a thought. Very nicely done sir!!!!
Yeah. I have a Pittsburgh accent. We talk funny lol
Toyota does offer valve timing specs. If you use TIS. It will be under the new car features tab. It is kind of hidden.
Unfortunately I don’t use it too often anymore because of VVT and they now just give you a valve timing window.
I wish they’d say that “at idle the EVO is x degrees.
@@VoltageDropDiagnostics We all have our accents...lol I did not know Toyota has the specs posted in the NCF. I appreciate the tidbit. I am going to search this out. Most manufactures have now given us the ability to see more data such as the VVT as in desired and actual. Engineers have a hard time giving us proper information because they feel we don't need to know it. This has been going on for decades. The average technician is a lot more educated than 40 years ago. But this makes us better technicians.
I agree. But i struggle with Toyota VVT timing data pids.
From 02-15ish every time i look at the VVT data it reads 0 degrees. I can get the data pids to read “something” if i go into active test. But even when I do that. They don’t make sense to me lol
Wow a very helpfull video, great Job💪💪💪💪
Thanks Dan!
Awesome video PJ. Great information. Gave me a little chance to test what I learned on Brandon’s webinar the other night. Thanks for posting!
Ha! Yeah for sure! Hopefully someone sees this video and it helps push toyota towards giving an advanced diag class.
Very cool thanks for sharing your knowledge
Thanks for watching!
Very nice find 👍. Bravo. BTW: i have one of Cody's gen-3 PDS and really liking it; crisp resolution and no noise (while experimenting with it on my own work van, i discovered a tiny intake problem in it's infancy 😠.
Yeah! Cody’s pulse sensor is great! Thanks for watching!
Absolutely fantastic study, PJ!! Thanks!! Love the methodical, logical approach to solving this problem!
Thanks Dave! I'm glad that you liked it!
very informative, your (Tims) path of diagnosing makes senses, nice to see that you don't just jump to swaptronics or dartboard guessing. My theory of why #5 shows low misfire count is that the cam and gear are surging with in each other caused by the dynamics with in the engine and chains of the cam tensioner.
I agree! I have read a couple good theories from some of the comments on here. It is actually making me wish that I had in cylinder waveforms for all 3 cylinders on that bank.
Camry 2.2 liter. Same thing but it made the catalytic converter turn bright red.
Oh wow! That thing was running real rich then!
Great video... picoscope is a must these days...👍👍
You got that right!
PJ, Albert Einstein would bow to your genius if he were still alive. Amazing vision and clarity to be able to assemble that puzzle and find the issue!
If you have a couple of hours to spare tomorrow, can you please find the cure to this stupid virus so we can all go back to our normal routines? I know you can do it....I have faith in you and your brilliance!
hahaha Dave, I promise you that i'm not smart. I just learn from smart people!
Great video PJ. Man you took the editing to a whole new level. Power up!
Glad you enjoyed it!
Awesome video man! I love the green screen with images and videos. You’ve always been amazing at explaining what we are looking at and that just made it even better! Thanks for making this study! In my opinion it’s a must watch!
I appreciate that! I had a lot of fun with the green screen as well. I am debating on double a couple more older case studies that I have in this style as well.
Voltage Drop Diagnostics don’t threaten me with a good time!
Watched this morning. Excellent explanation. With the pulse sensor have indicated an issue?
Thanks a good question. Im gonna say "probably" on an intake waveform. Because of the valve overlap happening on one bank.
Great video again. Great find. I can’t believe how many parts were thrown at it. I’ve had a few teammates with cars that I was going to pick your brain on but didn’t want to bug ya. Keep up the good work!
Hey man. Don't ever feel bad about contacting me. I can't always help. But I try to make time for people who put forth effort before contacting me. I enjoy helping out when I can.
It would nice if you had a exhaust signal but didn't have sensor. Maybe less miss fires on cylinder 5 because of scaveraging exhaust from cylinders 1 and 3. There more exhaust flow past cylinder 5 because 1 and 3 are ahead of it. I don't know but just a thought why you would have less miss fires on 5. Let me know what you think. Stay safe.
This is my best guess as well.
I like that theory. A couple other people commented something similar as well. I also wish that he had an exhaust waveform. I wanted to see the overlap and see how much it changed bank to bank.
PJ, as far as the misfire counter goes, I never really trust them when there is more than one cylinder misfiring. I would imagine that there is also the possibility that the cam is advancing and retarding as it rotates. The valve springs are probably placing enough load on the cam to cause it to move in both directions on that gear. This would probably also cause cylinders three and five to not always misfire... We need to actually meet in person some day. I'd enjoy sitting down and sharing diagnostic war stories with you haha.
great video VDD thanks for sharing
Glad you enjoyed it
Hi PJ, First time I've come across your channel. Really impressed with the content and production. I'm also trying to learn more about ociliscope diagnosis and have recently made a cheapo pressure transducer to get me started with in cylinder wave forms. Learned alot from this video, thank you.
Thanks for stopping by and I am glad that you liked the videos! And never stop learning! It will all pay off with time!
Great case study. Thanks for sharing!
Thanks for watching!
great find!!! i'm thinking (just guessing actually) # 5 is probably an artifact of the position and/or placement of the o2/afr sensor on that bank and or vacuum hose placement on the intake. when i fiest started watching i was thinking leaky purge valve sucking fumes out of the tank into one side of the intake
On that engine the purge sits directly in the middle of the plenum. I don’t know how it could get to one bank and not the other.
@@grabovg ok didnt know that. was thinking outloud lol
Excellent video.......do you think a volumetric efficiency test would have indicated a breathing issue on this one?
I am gonna answer with "maybe" I think that its plausible. But keep in mind that the engine was breathing. It was just pulling from the exhaust. But I can imagine that having a small effect on the MAF reading that might throw off the VE test a little.
But I like that question. I am going to go look at some of the scan tool files that he sent to see if I can see any of the MAF readings.
@@VoltageDropDiagnostics cool it would be interesting to know.......if it did indicate an issue it would perhaps be a good habit to do one at the same time or shortly after confirming customer complaint alongside a relative compression test / intake / exhaust pulse test as all are quite fast and easy and could save a lot of rabbit hole diving......i think sometimes we read fault codes and then jump a few steps instead of establishing the overall mechanical condition of the engine using easy and non intrusive / non committal tests that if nothing else will give an indication that the engine is at least worth spending time and money on
Amazing.
Thanks!
PJ, AWESOME INFORMATION AD WELL PRESENTED BROTHA.
Glad you enjoyed it
Super vid!! I was gonna watch a Sherlock Holmes mystery tonight but now I don't have to. Reminds me of a Scanner Danner video. That was a loose pulley that allowed the timing to b off. If the intake cam was off, it would have flagged a code because that is monitored. Super cool find!! Thank u!!
Exactly! People keep asking why it didnt set a cam timing code and I forgot to mention that this engine doesnt have a cam sensor for the exhaust cams.
Nice work with the assist , great case study .
Thanks buddy! I'm glad that you liked it!
Great video, presentation, & diagnosis. Thank you for sharing. Which computer or computers are you using with your PicoScope, I need to replace my PC?
Im using a toughbook that has an upgraded hard drive that a friend on mine builds for the automotive community. It also has all of the OEM software downloaded on it as well.
awesome case study PJ thanks for sharing what you and Tim went through, love having this out there. My guess is 5 didn't show on mode 6 because it prob didn't hit a high enough count for the PCM strategy to log it and most likely kept resetting. Nice Job! ...Jay
Thanks Jay! I have received a couple theories on cylinder 5. I keep hearing some good ones.
Many thanks for the amazing video
How many miles it had?
I believe around 100,000.
Well done my friend. Excellent with the explanation.
Thanks Nelson!
Green Screen ... looks great ! 👍
Thanks Carlos!
Great work
Thanks
Excellent - Thanks a bunch
Thanks Bill!
Hey man... that’s a great video. Pico for the win 💪🏻👊🏻
Hey, thanks! Pico always wins! haha
you are better than a toyota engineer! yes.
I wouldn't go that far. I just might be better at examining these waveforms. But some of those TAS agents and engineers are really good. But like everything. There are good and bad.
I think it was more than 5. 3 had only 75% of 1’s mises. 5 had 33% of 3’s. So was the progressive variation the result of exhaust path, as has been wondered. Or was the cam “walking” to and fro in the gear as it rotated?
When comparing a good to bad , the overlays can be overlayed on each other so that both can be viewed at the same time by adjusting the opacity.
Yeah, I overlay the waveforms sometimes. But a lot of times it feels more time consuming for me. But maybe it just feels that way fussing about getting everything perfectly lined up.
I think you might be onto something about how the misfires get gradually better from 1 to 3 and then 3 to 5
Love the video I need to get a pressure transducer would help a lot with diag.
It has been a game changer for me, for sure!
Great Video PJ !!
Thanks Steve!
Awesome Awesome Awesome!!!!!! nah brother you did an amazing job explaining that!!!! i really enjoy your videos, a lot of very beneficial information in just about all your videos!!!!!
Insightful. Good video.
Much appreciated
Thanks Pat, another great video and use of the WPS . Is there a website for Cody’s diagnostics
No website that I am aware of. But he does have a youtube channel "cody's auto diagnostics" and you should be able to reach out to him there.
Awesome video 👍
Sorry it took so long to subscribe to your channel brother
See you at Super Saturday, you are definitely teaching for us
Can't wait!
Regarding the difference in misfires count skewed towards the front of bank 1, any chance that camshaft was actually twisted along its length? I've come across that before. I suppose if you had the luxury and time of checking each in-cylinder waveform and seeing if the exhaust timing offset increased along the bank, that might make a case it was actually twisted and the timing issue was progressively worse at the front of the engine leading to more misfires.
I Wonder why that truck didn't throw a P0018 or similar code?
That’s a good question. The reason that it didn’t set timing codes for the exhaust is because this engine does not have an exhaust cam sensor.
The ECM only monitors the intake because it has VVT on the intake side.
Excellent work 👍👍
Many thanks
Very cool, thank you for this video and the software link, stay safe.
Thanks, you too!
Bravo ,Magnifico Great
Thanks Alex!
great video really awesome Mate ..
Thanks a lot!
I need to get my own pressure transducer tester....
Theyre not cheap. I always tell people to start with a pulse sensor and see if they like this style of testing. That way theyre not out a substantial amount of money if they don't like these tests.
How is the buffer on the Autel Scope?
It’s not bad. It doesn’t hold as much data as a pico if my memory is right. But the buffer is good enough for most diags. IMO
Alslam Alicom brother great video I have a question does the autel scope able to do In cylinder compression test and if it does how to set up the channel and what's the tool to do this job ., New arab subscriber here brother ,, all the best
Yes it does. You will still need a pressure transducer to go into the cylinder, and connect to the scope though.
A pressure sensor in the intake would have shown a lower vacuum pull for all cylinders on bank one. Maybe it would have also revealed differences between the individual cylinders on bank one as far as #5 lower misfires numbers are concerned....
Otherwise I can imagine that the difference on #5 may have been caused by a not that accurate misfire counter....
Did you/Tim check the cylinder contribution after the repair? If so, were all cylinders equal?
I agree with the pressure sensor in the intake. I also think that an exhaust waveform would have shown am issue where you can see the overlap in an exhaust waveform.
Tim hasn't repaired this engine. The more he tore into this engine, the worse it got. It had scored cam journals. And potentially bad main bearings I believe.
The customer opted for a reman engine.
Amazing diag
Thanks!
Great case study PJ, love the green screen 🏆
Thanks Steve!
Hi Patrick, how do you determine EV closing en IV opening, I find that hard to find.
Nice video
Greetings Hans
I also have a lot of trouble myself determining EV closing and IV opening. I don't have a good method, and I'm not always 100% sure if I get them marked right. Which is why I skipped over those measurements in the video lol. I don't want to give bad info.
Nu de school dicht is heb je wel mooi tijd om filmpjes te kijken😉
@@Diagnosedan Dat heb je mooi goed Danny, hows live? Mooie is dat ik de tip voor deze video kreeg van een student. Ik kende Patrick nog niet. Groetjes Hans
@@VoltageDropDiagnostics Hi Patrick, thanks for being honest, you can't know everything. Otherwise nice content on you're channel. Keep up the goed work. Greetings Hans
Awesome
Thanks!
Where did you get your piston degrees? Off of TIS?
Once you start looking at a lot of cars, you learn that valve timing for most of them is always pretty close to the same.
But to verify, you could always get a known good waveform. A Facebook page called “automotive waveform exchange” has tons of known good waveforms.
Good job brotha! Keep up the great work. -FixItPhillip
Appreciate it!
Facsinating, which made me go search to see if this is common (I take care of 3 of those motors in this house) Could not find much, is it just super rare? Or did I not search well? Thanks.
Nope. Not common at all. This is the first time I have seen it.
We think that this engine was actually ran out of oil and that the cam temporarily locked up.
There is damage to the cam journals on this engine that gives us that inclination.
Good stuff !!!
Thanks!
very good very bro...keep it up man
Thanks a lot
Ford nation is gonna be hunting you down after that comment LOL
Awesome video and awesome explanation!
I heard that ford techs cant fight either! hahaha J/K...Relax every one! It is just a joke haha
was wondering what procedure is required to fix this issue?
So after filming this video, and talking to Tim a little more. He found that the cam journals were scored pretty badly, most likely from the engine running low on oil. Why was it low on oil? That I cant answer you. But he ended up talking to the customer and explaining what he found and the customer agreed that the best course of action was to install a reman engine.
@@VoltageDropDiagnostics thanx
Nice vid setup!! Great case study!!
Glad you enjoyed it
Hi there pat. I'm a Toyota expert working at a dealership where parts are thrown at cars. I'm interested in the pressure transducer and pico scope. Is there a training module on the E learning site that I can take to learn about this. Thanks in advance.
Hey Miguel! I have a lot of videos using the picoscope for different diagnosis. But the reality is, Toyota does not give us the best Picoscope training. It is something that I am pushing for though. My advice to you is to find local AFTERMARKET training to attend. Companies like CTI, WTI, ATG, Standard all have scope training, which is where I learned how to use a scope.
And also, continue watching youtube videos as well. There is a lot to be learned right here on youtube.
@@VoltageDropDiagnostics thank you pat. I watched your video comparing scopes and clicked on the link for trained by techs. Now to go dig out the dusty pico scope equipment out of the sst box.
Wassup pj! Glad to see a new video!!
Whats up Greg! I see you're still killing it! I don't know how you do so much heavy line work nonstop! Everyday I feel like you're pulling another motor out! haha
Voltage Drop Diagnostics Man that’s all I can get around here bro! Ppl drive their cars till they grenade! 💥 ‼️😂
It seems like it! Can’t this man just get a brake job one day! Haha
Voltage Drop Diagnostics The car gods have answered that prayer! Got a brake job today! On a Bimmer tho 🤣 2012 bmw 750 LI with coils and plugs! Wish me luck lol
Hahaha! It's about time that you got yourself a little gravy! haha
Nice one bro 👌 💪💪💪👏
Thanks Joel!